Sand pipe for rock drills



Jan. 1, 1929. l c. c. HANSEN SAND PIPE FOR ROCK DRILLS y vFiled March 17, 1928 I zsneets-sheex 1 Flai-1.

IN V EN TOR.

u Cha lesCHuasen BY@ Qf\ 5,/ 5 HIS ATTORNEY jan. E, i929,

c. c. HANSEN SAND PIPE FOR ROCK DRILLS Filed March 17, 41928 2 Sheets-Sheet 2 INVENToR. Ha'nseia HIS ATTORNEY g/zal@ Patented Jan. 1,. 1929.

UNITEosrATss PATENT OFFICE.

CHARLES C. HANSEN, F EASTON, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL-RAND COMPANY, 0F JERSEY CITY, NEIN JERSEY, A CORPORATION `OF NEW JERSEY.

SAND PIPE Fon Rocx DRILLS.

Application filed March 17, 1928. Serial No. 262,471.

This invention relates to fluid actuated rock drills of the type mounted on abarge or4 other support for -drilling submerged material, but more particularly to a sand pipe 5 adapted to extend from the barge to the mate# rial intended to be drilled to form a guide for' the working implement.

Other objects of the invention are to preventthe admission of silt or broken material into the drill hole, to facilitate the charging of the drill hole and to enable the sand pipe to be readily actuated into and out of the operative position.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawings forming part of the speciiication, v i

Figure 1 is a transverse sectional elevation ofa drill barge equipped with sand pipes constructed in accordance with the practice of the invention,

Figure 2 is a front elevation of a portion of a drilling tower showing the sand pipes in the operative position, and Figure 3 is a similar view showing the position which the sand p'ipe may occupy durin the transportation .of the unit from one -si e to another.

' Referring more particularly to the drawings, A designates a barge and B columnar supports or anchors adapted to rest on the rock C for supporting the barge AA above the surface of the water D during the drilling operation. In accordance with the present invention,

the barge A is provided with a well E or, as`

length. In order to eliminate the necessity illustrated, a pair of wells E which extend longitudinally of the barge. On opposite sides of the wells E are disposed rails F upon which are slidably mounted drilling towers Gr. The drilling towers G comprise in this instance vertical guidel members H resting on sills J land are supported near their uppermost ends by diagonal bars K connected at t5 one end to the guide niembers H and at their 4 other ends to the sills J.

' Slidably mounted on the guide members H are rock drills -L supported by cables O l trained over sheaves P at the uppermost ends of the guide members H. The cables O are wound on hoist drumsQ, mounted on platforms R on the towersv G.

' In order to prevent the admission of silt and debris such as is usually found on the bottom of a stream into the drill hole S, the' unit is provided with sand pipes T which extendv slidably into guide pipes U supported 1n this instance. by the sills J. The' guide pipes U are preferably ofsuch length as to extend only a short distance below the barge A and are threaded intov heads V having flanges W adapted to slide in guideways 'X' l:t'ormed by plates Y and Z-bars Z. The plates Y and Z-bars Z are supported by the sills J to which they may be secured in any suitable manner. v The sand pipes T may be of any suitable length depending upon the depth of the water D and the bore of said pipes need be only slightly greater than the diameter of the Working bits of drill steels which extend therethrough. A

Convenient means are provided for raising and lowering the sand pipes T. To this end sheave blocks c are connected to the lowermost ends of the sand pipes T to receive cables d connected with one end to blocks e attached to the guide pipes U and the opposite end of the cables al may be secured to anchors f on the barge A. Y

In the operative position, the pipes T and U are of course in coaxial alignment with the rock drills L. When transporting vthe unit, however, it is desirable that the sand pipes T be elevated somewhat to prevent them from encountering the bottom of the stream; When sand pipes T of considerable length ken sov

are used, `it would, of course, be diiiicult to i elevate the sand pipes while the pipes are in alignment with the rock drills unless the guide members H also were of considera-ble of employing guide members H of excessive height, means are provided for moving thev pipes T and U out of ali nment with the rock drills to a position in w ich the pipes T may be raised to any desired elevation. The' means utilized for this purpose comprise screws g which are in threaded engagement with projections 7L carried by the heads V.

The ends of the screws g are mounted.rotat' ably in, bearings j and lo secured to/ the sills J and to one end of the screws g are secured.

crank handles o whereby the screws g may be rotated'. p

- The operation of the device is as follows: After the barge A has been raised above the water D and secured to the anchorsB in any suitable and well knownmanner, the sand pipes T may be lowered by means of the cables d. Due to the weight of the pipes T said pipes will readily penetrate the silt over- 'the drill holes S have been charged, the sand pipes T may again be raised by means of the cables d until the lowermost ends of the pipes T are free from the bottom of the stream. The towers G are then moved longitudinally ofthe barge A to a new position and the pipes T lowered preparatory to a new drilling opv eration.

Whenever it is desired to move the barge A to another drilling site, the pipes T and U may be moved out of coaxial alignment with the drills by means of the screws g. The sand pipes T may then be raised until the front ends thereof substantially reach the lowermost points of the pipes U. In this position both pipes will clear the bottom of the stream and the barge A may be readily transported from one position to another without lin the stream.

I claim:

1. In a drill unit for submarine drilling, the combination of a support and a tower on the support, a rock drill mounted on said tower, .a guide pipe, a sand pipe slidable in said guide pipe, and means for actuating the pipes into and out of coaxial alignment with therock dri l. v

2. In a drill unit for sublnarine drilling, the combination of a support and a tower on the support, a rock drill slidab-le on the tower, a guide pipe,a sand pi e slidab-le inthe guide pipe, means for slida ly actuating the sand pipe in the guide pipe, and means for supporting the pipes and for actuating said pipes into and out of coaxial alignment with the rock drill.

3. In a drill unit for submarine drilling, the combination of a support and a tower on the support, a rock drill slidable on the tower, a. guide pipe, a sandpipe slidable in the guide pipe, a cable for manually raising and 1ow-` ering the sand pipe in the guide pipe, and a screw rotatablein the tower and in engagement with the guide pipe for actuating the pipes into and out of coaxial alignment with the rock drill.

In testimony whereof I have signed this specification.

A CHARLES C. HANSEN. 

